// JavaScript Document
var dhNum = "";
function showDH(dh){
	if(dhNum == ""){
		document.getElementById(dh).style.display = "";
		dhNum = dh;
	}else{
		if(dhNum == dh){
			document.getElementById(dh).style.display = (document.getElementById(dh).style.display == "")?"none":"";
		}else{
			document.getElementById(dhNum).style.display = "none";
			document.getElementById(dh).style.display = "";
			dhNum = dh;
		}
	}
}